Install from Scratch - Lemmy Documentation
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I’m trying this on Ubuntu 22.04 Rust’s cargo install seems to keep creating permission problems between what I have to install, compile and what gets published in the cargo “registry”, which causes issues at runtime when I run as lemmy:lemmy through systemctl.

If I run: cargo install lemmy_server --target-dir /usr/bin/ --locked --features embed-pictrs as a non-root user, I get permission denied issues with /usr/bin/.future-incompat-report.json and /usr/bin/release

If I run the build as a root user, and then manually copy the binaries to /usr/bin and chmod them to lemmy:lemmy, then try to run as lemmy:lemmy, it appears the binary is trying to access some “registry” files in /root/.cargo/registry (for which of course it does not have permissions.)

How do I fix this?

  • RoundSparrow
    3•11 months ago

    > thread ‘main’ panicked at ‘Couldn’t run DB Migrations’, crates/db_schema/src/utils.rs:165:25

    I fixed this by issuing:

    sudo -iu postgres psql -c “ALTER USER lemmy WITH SUPERUSER;”

    Obviously this has database security implications, but at least it identified that was why DB Migrations is failing.

    EDIT: I found the developers of Lemmy seem to have identified the cause for this, it’s just a couple SQL statements: https://github.com/LemmyNet/lemmy/pull/2983/commits/29c4144e61e97e895fb7eb37d2c257c8520fd6a6

    EDIT 2: The developers are currently treating this as a documentation bug: https://github.com/LemmyNet/lemmy-docs/issues/201

    • @KIM_JONG_JUICEBOXOP
      2•11 months ago

      Thank you!

      So the git based build instructions from @Grouchy@lemmy.grouchysysadmin.com works.

      What was missing for me was then the rust version and the full list of sql commands.

      1. Rust version

Remove rust installed from Ubuntu apt repo (v 1.65)
Install rust from rustup (v 1.70)

2. Postgres commands

sudo -iu postgres psql -c "CREATE USER lemmy WITH PASSWORD 'db-passwd';"
sudo -iu postgres psql -c "CREATE DATABASE lemmy WITH OWNER lemmy;"
sudo -iu postgres psql -c "ALTER USER lemmy WITH SUPERUSER;"
      • RoundSparrow
        2•11 months ago

        The lemmy-ui steps, the next part - are pretty outdated. It has instructions to install NodeJS 12.x, which is really far back. I have no idea which version the Docker install is using…

        The latest version of Node is 20

        • @KIM_JONG_JUICEBOXOP
          2•11 months ago

          Before I even get there, the instructions say I should be able to run

          curl localhost:8536/api/{version}/site

          And it should return some json structure.

          But I see this returning 404

          lemmy_server[41511]: 2023-06-09T17:02:35.296098Z  INFO actix_web::middleware::logger: 127.0.0.1 "GET /api/0.17.3/site HTTP/1.1" 404 0 "-" "curl/7.81.0" 0.000074

          Is that the correct way to specify the version?

          Is there a better log than journalctl which would actually tell me what REST endpoints it is using?

          • RoundSparrow
            2•11 months ago

            Is that the correct was to specify the version?

            No, I had to dig around too, the correct command is:

            curl localhost:8536/api/v3/site

            • @KIM_JONG_JUICEBOXOP
              1•11 months ago

              Thank you, again!

              How was I to know {version} in the REST endpoint path was supposed to be “v3”?

              Any luck with the lemmy-ui install?

              • RoundSparrow
                1•11 months ago

                I knew it was v3 because I saw a webapp failure on one of the Lemmy instance (lemmy.ml) I was using ;) We need to update those install documents.

                It seems right now I can get a client to load, but websockets aren’t working. Others on Reddit reported the same issue: https://old.reddit.com/r/Lemmy/comments/142sszq/spinning_up_lemmy_websockets_dont_connect/

                EDIT: Ok, I solved the websocket problem by using proper nginx config that the instructions said. I was confused about the domain names with the certification generation as I already had some nginx certs for other subdomains in place.

                  • RoundSparrow
                    2•11 months ago

                    Oops. I was running some test code that IIRC set the bot field (it was code for creating a bot) on my own login. I just changed it. Thanks for letting me know.